Polystichum aculeatum var. contortum C.Hope Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Polypodiopsida order Polypodiales family Dryopteridaceae genus Polystichum species Polystichum mehrae Name Homonyms Polystichum aculeatum var. contortum C.Hope Polystichum aculeatum var. contortum C.Hope ex E.W.Trotter